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// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

// * Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

// * Redistributions in binary form must reproduce the above

// copyright notice, this list of conditions and the following disclaimer

// in the documentation and/or other materials provided with the

// distribution.

// * Neither the name of Google Inc. nor the name Chromium Embedded

// Framework nor the names of its contributors may be used to endorse

// or promote products derived from this software without specific prior

// written permission.

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef CEF_INCLUDE_CEF_BASE_H_

#define CEF_INCLUDE_CEF_BASE_H_

#pragma once

#if !defined(GENERATING_CEF_API_HASH)

#include "include/base/cef_build.h"

#endif

#include "include/base/cef_atomic_ref_count.h"

#include "include/base/cef_macros.h"

// Bring in common C++ type definitions used by CEF consumers.

#include "include/internal/cef_ptr.h"

#include "include/internal/cef_time_wrappers.h"

#include "include/internal/cef_types_wrappers.h"

#if defined(OS_WIN)

#include "include/internal/cef_win.h"

#elif defined(OS_MAC)

#include "include/internal/cef_mac.h"

#elif defined(OS_LINUX)

#include "include/internal/cef_linux.h"

#endif

///

/// All ref-counted framework classes must extend this class.

///

class CefBaseRefCounted {

public:

///

/// Called to increment the reference count for the object. Should be called

/// for every new copy of a pointer to a given object.

///

virtual void AddRef() const = 0;

///

/// Called to decrement the reference count for the object. Returns true if

/// the reference count is 0, in which case the object should self-delete.

///

virtual bool Release() const = 0;

///

/// Returns true if the reference count is 1.

///

virtual bool HasOneRef() const = 0;

///

/// Returns true if the reference count is at least 1.

///

virtual bool HasAtLeastOneRef() const = 0;

protected:

virtual ~CefBaseRefCounted() {}

};

///

/// All scoped framework classes must extend this class.

///

class CefBaseScoped {

public:

virtual ~CefBaseScoped() {}

};

///

/// Class that implements atomic reference counting.

///

class CefRefCount {

public:

CefRefCount() = default;

CefRefCount(const CefRefCount&) = delete;

CefRefCount& operator=(const CefRefCount&) = delete;

///

/// Increment the reference count.

///

void AddRef() const { ref_count_.Increment(); }

///

/// Decrement the reference count. Returns true if the reference count is 0.

///

bool Release() const { return !ref_count_.Decrement(); }

///

/// Returns true if the reference count is 1.

///

bool HasOneRef() const { return ref_count_.IsOne(); }

///

/// Returns true if the reference count is at least 1.

///

bool HasAtLeastOneRef() const { return !ref_count_.IsZero(); }

///

/// Returns the current reference count (with no barriers). This is subtle,

/// and should be used only for debugging.

///

int SubtleRefCountForDebug() const {

return ref_count_.SubtleRefCountForDebug();

}

private:

mutable base::AtomicRefCount ref_count_{0};

};

///

/// Macro that provides a reference counting implementation for classes

/// extending CefBase.

///

#define IMPLEMENT_REFCOUNTING(ClassName) \

public: \

void AddRef() const override { \

ref_count_.AddRef(); \

} \

bool Release() const override { \

if (ref_count_.Release()) { \

delete static_cast<const ClassName*>(this); \

return true; \

} \

return false; \

} \

bool HasOneRef() const override { \

return ref_count_.HasOneRef(); \

} \

bool HasAtLeastOneRef() const override { \

return ref_count_.HasAtLeastOneRef(); \

} \

private: \

CefRefCount ref_count_

#endif // CEF_INCLUDE_CEF_BASE_H_

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